Cock-coupling.



E. 'WITZENMANN. UOGK COUPLING. APPLICATION FILED APB. 11. 1907.

902,192. Patented 001127, 1 08.

EMIL WITZENMANN, OF PFORZI-IEIM, GERMANY.

COCK-COUPLING.

Specification of Letters Patent.

Patented Oct. 27 1908.

Application filed. April 11, 1907. Serial No. 367,494.

To all whom it may concern:

Be it known that I, EMIL VITZENMANN, manufacturer, a subject of theGrand-Duke of Baden, residing at Pforzheim, German Empire, No. 4E8I-Iolzgartenstrasse, have invented new and useful Improvements inCock-Couplings, of which the following is a specification.

The subject of my invention is an improved device for coupling a pipe toa cook. The essential feature of the invention is that on disconnectingthe pipe from the cock the latter is locked automatically in the closedposition, so that it can not be opened again until the locking devicehas been actuated; while, on the other hand, on connecting the pipe tothe cook the latter is automatically unlocked, so that it can be openedand closed as desired.

One form of construction of the invention is illustrated in theaccompanying drawing, in which Figure 1 is a side elevation of the cockin the moment of a hose pipe being uncoupled. Fig. 2 is a side elevationand part section of the hose pipe end, the position of the partscorresponding with Fig. 1. Fig. 3 is an end elevation of Fig. 1. Fig. 4is a plan of Fig. 1, and Fig. 5 is a plan of Fig. 2. Fig. 6 is anelevation of the cock with hose coupled thereto, the plug being shown inthe open position. Fig. 7 is a plan of Fig. 6.

On the nozzle 1 of the cock there is provided a rotary collar 2, whichis held in place by a pin 3 on the nozzle fitting into a recess 1 in thecollar. The nozzle is also furnished with a groove 5, and the couplingpiece 6 of the hose has pins 7 which in conjunction with notches 8,entering the groove 5, constitute a bayonet-joint for coupling hose andcock.

The collar 2 is provided with notches 9 corresponding with horns 10 onthe coupling piece of the hose. The collar is further furnished with alug 11, which in a certain position of the collar abuts against a planesurface 12 of the cock plug and locks the cock in this position.

The face 12 is so located that when the lug 11 abuts against it, theplug is in the closed position.

If the hose is, for instance, to be detached from the cook, the collar 2must first be brought into the position shown in Fig. 1, as

the horns 10 of the ring 6 which forms the bayonet-joint engage in thenotches 9 of the collar 2 and turn the latter on rotation of thecoupling piece of the hose. In order, however, to be able to bring thecollar 2 with lug 11 into the position shown in Figs. 1 and 4-, the plugmust be first so turned as to bring its face 12 into the position shownin these figures, and in this position the cock is closed. Thus afterremoval of the hose the cock can only be opened if the collar 2 with itslug 11 is turned from the position shown in Fig. 1 into that shown inFig. 6; there is thus double security afforded for the cock.

When the hose is applied to the cock the latter is automaticallyunlocked by the rota tion of the collar 2 and can then be opened atonce.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is: A

1. In a cock coupling, a pipe having a coupling piece, a cock having aplug with a plane surface, a collar rotatably mounted on the nozzle ofthe cock, means for limiting the rotation of said collar, and means onthe collar for engaging said plane surface to look the plug in itsclosed position.

2. In a cock coupling, a pipe having a coupling piece, a cock having aplug with a plane surface, a collar rotatably mounted on the nozzle ofthe cock, means for limiting the rotation of said collar, means on thecollar for engaging said plane surface to lock the plug in its closedposition, and means on said coupling piece to engage notches in saidcollar.

3. In combination, a pipe having a coupling-piece presenting two horns;a cock having a plug, and a nozzle making a bayonetjoint with the pipecoupling-piece, and presenting a pin; and a collar rotating on thenozzle and having a recess to receive said pin and notches to receivesaid horns and a lug adapted to engage with a face of the plug and lockthe latter in closed position when the bayonet-j oint is open and thehorns lie in their notches; substantially as described.

4. In a cock coupling, a pipe having a coupling piece, a cock having aplug with a plane surface, a collar rotatably mounted on the nozzle ofthe cock, means for limiting the rotation of said collar, means on thecollar for engaging said plane sln'face to lock the my name this 20thday of lvlul'ch 1907, in the plug 111 its closed posltlon, means on szudpresence of two subscrlblng wltnesses.

coupling piece to engage notches in said (:01- FMH VVIT7ENMANN hug andmeans on the cone]? for engagnlent J J 5 with the nozzle to form abayonet-joint Witnesses:

therewith. ERNEST ENTERNNAM, In witness whereof I have hereunto signedHENRY H. MORGAN.

